// variables.cpp
#include <iostream>
#include <string>

int main() {
    int age = 30; // 整型变量
    double height = 175.5; // 浮点型变量
    char grade = 'A'; // 字符型变量
    bool is_student = true; // 布尔型变量
    std::string name = "张三"; // 字符串

    std::cout << "Name: " << name << std::endl;
    std::cout << "Age: " << age << std::endl;
    std::cout << "Height: " << height << " cm" << std::endl;
    std::cout << "Grade: " << grade << std::endl;
    std::cout << "Is student? " << (is_student ? "Yes" : "No") << std::endl;

    return 0;
}